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Author Question: It takes 6400 years for one gram of radium to decay away to only 1/16one-sixteenthof a gram. The ... (Read 29 times)

ETearle

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on: Jul 29, 2018
It takes 6400 years for one gram of radium to decay away to only 1/16one-sixteenthof a gram. The half-life of radium is
 
  A) not possible to determine from this information.
  B) 1600 years.
  C) 400 years.
  D) 3200 years.
  E) 800 years.

Question 2

In a carnival ride, passengers stand with their backs against the wall of a cylinder. The cylinder is set into rotation and the floor is lowered away from the passengers, but they remain stuck against the wall of the cylinder.
 
  For a cylinder with a 2.0-m radius, what is the minimum speed that the passengers can have so they do not fall if the coefficient of static friction between the passengers and the wall is 0.25? A) 8.9 m/s
  B) 2.3 m/s
  C) 3.0 m/s
  D) 4.9 m/s
  E) It depends on the mass of the passengers.
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whitcassie

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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ETearle

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Reply 2 on: Jul 29, 2018
Gracias!

mohan

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Reply 3 on: Yesterday
Excellent

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